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theoretical question

Post in 'The Pellet Mill - Pellet and Multifuel Stoves' started by homemade, Dec 22, 2012.

  1. SmokeyTheBear

    SmokeyTheBear Minister of Fire

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    Don't forget those space rocks that keep on a coming down.

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  2. pen

    pen There are some who call me...mod. Staff Member

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    fingers crossed they stay small
  3. St_Earl

    St_Earl Minister of Fire

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    so a boiler, then?

    that would explain the height.
    cool project. would love to see more of it.
    what is the space it's heating?
  4. sandpipe

    sandpipe Member

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    Some day we'll have fusion stoves and the ash left will weigh less than the pellet.
  5. homemade

    homemade New Member

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    my house
  6. ChandlerR

    ChandlerR Minister of Fire

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    I thought it was 5.
  7. St_Earl

    St_Earl Minister of Fire

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    surely you mean 42.
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  8. subsailor

    subsailor Minister of Fire

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    Please don't call me Shirley.
  9. Ironhorse74

    Ironhorse74 Member

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    I don't think you can use the weight of the burnt pellets as efficiency. Efficiency would be something like BTU available in the pellets (approximatly 8700 BTU's per pound) / BTU's lost up the vent. Which assumes the remaining BTUs go into heating the house.

    Peace

    Brad
    SmokeyTheBear likes this.
  10. Harvey Schneider

    Harvey Schneider Minister of Fire

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    %Efficiency = (BTUout / BTUin) x 100

    or

    %Efficiency = ((BTUin - BTUlost) / BTUin) x 100

    I think that 8700 BTU / pound may be a little too high. Actual energy yeild is reduced by moisture content of the pellets. That is the energy used to drive the absorbed water back into a vapor state.
    By the way, the relative humidity where the pellets are stored will affect the BTU's available because wood will reach an equilibrium moisture content with the air based on the relative humidity of the air. This is why wood changes dimensions winter to summer.
    SmokeyTheBear likes this.
  11. P38X2

    P38X2 Minister of Fire

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    So thus far we've learned that A) Harman stoves convert 100% of the potential wood pellet energy into 101% heat energy (even NEWP).... and B) NEWP are still wicked ashy? Correct?
    DAKSY likes this.

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